CN107923695B

CN107923695B - Conditioner and the freezer for container including conditioner in the case in case

Info

Publication number: CN107923695B
Application number: CN201680049812.2A
Authority: CN
Inventors: 亀井紀考; 山本晃二; 水谷和秀
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 2015-08-28
Filing date: 2016-08-24
Publication date: 2019-03-08
Anticipated expiration: 2036-08-24
Also published as: EP3339777A1; JP6137249B2; US10098366B2; US20180235247A1; CN107923695A; JP2017044452A; EP3339777B1; EP3339777A4; SG11201801553YA; WO2017038056A1; DK3339777T3

Abstract

CA device (60) is configured to allow first and second absorbing cylinder (34, 35) in first and second absorbing cylinder (34, 35) alternately absorption movement and desorption act in, to generate nitrogen concentration is higher than air and oxygen concentration is lower than air nitrogen-rich air and feed to the nitrogen-rich air in the casees of container (11), the CA device (60) carries out the second operation mode, under second operation mode, the nitrogen-rich air that generates is arranged to outside the case of container (11) in a period of by until playing by the stipulated time since desorption movement at the time of, and in the case that the nitrogen-rich air generated in a period of after the stipulated time until at the time of desorption, which acts, to be terminated is fed to container (11).

Description

Conditioner and the container system including conditioner in the case in case Device for cooling

Technical field

The present invention relates to conditioner in a plants case and the container refrigeration including conditioner in the case Device, conditioner is used to that the composition of air in the case in container is adjusted in the case.

Background technique

So far, freezer for container is used in order to cool down the air in the container used whens sea-freight etc., The freezer for container has the refrigerant circuit for carrying out refrigeration cycle (referring for example to patent document 1).In container The plant such as being loaded with banana, avocado in case.Plant also continues with the oxygen and release dioxy absorbed in air after harvesting Change the such breathing of carbon.Once plant is breathed, the nutrient and moisture accumulated in plant are just reduced, the freshness of plant can under Drop.Therefore, the oxygen concentration in container case is down to will not cause the degree of respiratory disorder preferably.

Patent Document 1 discloses conditioner in a plants case, in the case, conditioner, which passes through, utilizes suction Attached dose generates the nitrogen-rich air that nitrogen concentration is higher than air and oxygen concentration is lower than air, and the nitrogen-rich air is fed to the case of container It is interior, so that making the oxygen concentration of air in case reduces, the respiratory capacity of plant is reduced, accomplishes the freshness for being easy to maintain plant, In, the adsorbent compression will adsorb the nitrogen component in air.In the case in conditioner, carrying out utilizing air pump Air after pressurization is sent in the absorbing cylinder for being accommodated with adsorbent and after allowing the absorption of adsorbent absorption nitrogen component to act, into The desorption that row aspirates air from absorbing cylinder using air pump and the nitrogen component being adsorbed in adsorbent is allowed to desorb acts, thus Generate nitrogen-rich air.

Patent document 1: Japanese Laid-Open Patent Publication Laid-Open 2015-072103 bulletin

Summary of the invention

Technical problems to be solved by the inivention-

However, as shown in figure 14, for conditioner in above-mentioned case, the oxygen concentration of the nitrogen-rich air of generation is being opened Beginning carries out higher after desorption movement, then gradually decreases.It is considered that this is because being inhaled when just starting to carry out desorption movement Remained in absorbing cylinder, pipeline etc. in attached movement for the outer air of the case come, in above-mentioned nitrogen-rich air comprising the outer air of the case it Therefore.Moreover, the nitrogen-rich air generated during entire desorption acts is fed to packaging in above-mentioned case in conditioner In the case of case.Although being also supplied with that is, the extremely low nitrogen-rich air of oxygen concentration can be supplied and just having started to carry out to desorb to move The higher nitrogen-rich air of oxygen concentration when making.Accordingly, because can be intermediate concentration for oxygen supply mean concentration in desorption movement Nitrogen-rich air, so could not accomplish that the oxygen concentration of air in the case in container is adjusted in than case to conditioner is given birth to At nitrogen-rich air the low concentration of oxygen mean concentration.

The present invention is exactly to complete in view of the above problems, its object is to: conditioner in case is configured to Enough the oxygen concentration of air in case is adjusted to lower than the oxygen mean concentration of nitrogen-rich air generated, wherein air tune in the case Regulating device generates nitrogen-rich air and feeds to the nitrogen-rich air in the case of container to the composition of air in regulating box.

To solve the technical solution-of technical problem

The first aspect of the disclosure is conditioner in a plants case, is mounted on the plant 15 that storage is breathed On container 11, conditioner includes: absorbing cylinder 34,35 in the case, is accommodated in the inside of the absorbing cylinder 34,35 Adsorb the adsorbent of the nitrogen component in air；First pump machanism 31a, the first pump machanism 31a is by feeding to air outside case It pressurizes in the absorbing cylinder 34,35 to the absorbing cylinder 34,35, so that the absorbing cylinder 34,35 is allowed to carry out absorption movement, the absorption Movement are as follows: the movement of the nitrogen component in the air is adsorbed by the adsorbent in the absorbing cylinder 34,35；And second pump machanism 31b, the second pump machanism 31b are depressurized the absorbing cylinder 34,35 and the extraction air out of described absorbing cylinder 34,35, from And the absorbing cylinder 34,35 is allowed to carry out desorption movement, desorption movement are as follows: make to be inhaled by the adsorbent in the absorbing cylinder 34,35 Attached nitrogen component desorbs into the movement in the air, and conditioner is constituted in the case are as follows: allows the absorbing cylinder 34,35 The alternately described absorption movement and desorption movement, to generate the richness that nitrogen concentration is higher than air and oxygen concentration is lower than air Nitrogen air, and the nitrogen-rich air fed in the case of the container 11, conditioner is configured to carry out portion in the case Point supplying operation will play at the time of since desorption movement in the part supplying operation and be by the stipulated time The nitrogen-rich air generated in a period of only is arranged outside the case of the container 11, and will be after the stipulated time In the case that the nitrogen-rich air generated in a period of until at the time of the desorption, which acts, to be terminated feeds to the container 11.

In the first aspect of the disclosure, alternately absorption movement and desorption movement is in absorbing cylinder 34,35 to generate Nitrogen-rich air, and the nitrogen-rich air of generation fed in the case of container 11, to make the oxygen of air in the case in container 11 Concentration reduces.

In addition, be configured to conditioner 60 in case to carry out part supplying operation in the first aspect of the disclosure, In the part supplying operation, will not since desorption movement at the time of play by the stipulated time until in a period of generate Nitrogen-rich air feed in the case of container 11 and arrange the nitrogen-rich air outside case, and will only be arrived after the stipulated time The nitrogen-rich air generated in a period of until at the time of desorption movement terminates is fed in the case of container 11.It is supplied in above-mentioned part In operating, it is discharged in the case that the higher nitrogen-rich air of oxygen concentration that desorption movement initial stage generates is not supplied to container 11 Outside case, thus the only lower nitrogen-rich air of oxygen concentration is fed in the case of container 11, wherein the lower rich nitrogen of the oxygen concentration is empty Gas is will to generate after the outer air discharge of the case remained in absorbing cylinder 34,35, pipeline etc..

The second aspect of the disclosure be it is such, in the first aspect of the disclosure, conditioner structure in the case Become: the oxygen concentration of air carries out whole supplying operations before reaching normal concentration or less in the case in the container 11, In the whole supplying operation, will since the desorption movement at the time of play end at the time of until in a period of generate The nitrogen-rich air all feed in the case of the container 11；Once the oxygen concentration of air in the case in the container 11 Reach the normal concentration hereinafter, just carrying out the part supplying operation.

As above-mentioned part supplying operation, if a part of the nitrogen-rich air generated in desorption acts not fed to A part of the nitrogen-rich air generated in desorption acts is arranged outside case in the case of container 11, then feeds to 11 case of container The amount of interior nitrogen-rich air can be reduced.Thus, it may occur that following problem, it may be assumed that if in the case in container 11 air oxygen Part supplying operation is carried out when concentration is higher, although it is very few then to have supplied the lower nitrogen-rich air supply amount of oxygen concentration, so The oxygen concentration of air is difficult to decrease in case in container 11.

Then, in the second aspect of the disclosure, conditioner 60 in case is constituted are as follows: the case in container 11 The oxygen concentration of interior air is reduced to normal concentration or less pervious period, carries out the nitrogen-rich air generated in desorption acts is complete Portion feeds to whole supplying operations of container 11, after the oxygen concentration of air in the case in container 11 decreases, then carries out Part supplying operation arranges the higher nitrogen-rich air of oxygen concentration generated at desorption movement initial stage in the part supplying operation It goes out, and only feeds to oxygen concentration lower nitrogen-rich air in the case of container 11.

The third aspect of the disclosure be it is such, in the first or second aspect of the disclosure, air conditioning in the case Device is constituted are as follows: as the oxygen concentration of air in the case in the container 11 declines, is extended in the part supplying operation The nitrogen-rich air is arranged into the efflux time outside the case of the container 11.

In the supplying operation of part, it is longer that nitrogen-rich air is arranged into the efflux time outside the case of container 11, feeds to packaging The oxygen concentration of nitrogen-rich air in case 11 casees is lower.On the other hand, in the supplying operation of part, nitrogen-rich air is arranged to packaging Efflux time outside the case of case 11 is longer, and the supply amount for feeding to the nitrogen-rich air in container 11 casees is fewer.Thus, it may occur that Following problem, it may be assumed that during the oxygen concentration of air is higher in the case in container 11, if the lower rich nitrogen of oxygen concentration is empty The supply amount of gas is very few, even if having supplied the lower nitrogen-rich air of oxygen concentration, the oxygen concentration of air in the case in container 11 It is difficult to decrease.

Then, in the third aspect of the disclosure, as the oxygen concentration of air in the case in container 11 reduces, extend Nitrogen-rich air is arranged into the time outside the case of container 11 in the supplying operation of part.That is, in the case in container 11 When the oxygen concentration of air is higher, compared with the oxygen concentration for feeding to the nitrogen-rich air in container 11 casees, pay the utmost attention to feed to packaging The supply amount of nitrogen-rich air in case 11 casees, therefore not only feed to oxygen concentration extremely low nitrogen-rich air in container 11, but also Also the slightly high nitrogen-rich air of oxygen concentration is fed in container 11.On the other hand, when the oxygen of air in the case in container 11 After concentration decreases, compared with the supply amount for feeding to the nitrogen-rich air in container 11 casees, pay the utmost attention to feed to container 11 The oxygen concentration of nitrogen-rich air in case, therefore only feed to oxygen concentration lower nitrogen-rich air in the case of container 11.

The fourth aspect of the disclosure be it is such, in the disclosure first into third aspect either side, in the case Conditioner includes: supply passageway 44, and the supply passageway 44 is connect with the ejiction opening of the second pump machanism 31b, and It will be out of, the nitrogen-rich air that the second pump machanism 31b sprays guides the container 11 into case；Oxygen drain passageway 45, it is described Oxygen drain passageway 45 is connect with the absorbing cylinder 34,35, and by nitrogen concentration is lower than air and oxygen concentration is higher than air oxygen-enriched sky Gas arranges the outside of the conditioner into the case, wherein the oxygen-enriched air is to carry out the suction in the absorbing cylinder 34,35 It is attached movement and generate；Exhaust connecting path 71, the exhaust is with connecting path 71 by the supply passageway 44 and the oxygen Drain passageway 45 connects；Exhaust switch valve 72, the exhaust are arranged with switch valve 72 in the exhaust connecting path On 71, the exhaust switch valve 72 is opened, closes the exhaust connecting path 71；Supply side switch valve 73, the supply side Switch valve 73, which is arranged in the supply passageway 44, more leans on the collection with the interconnecting piece of connecting path 71 than being connected with the exhaust On part on the inside of the case of vanning 11, the supply side switch valve 73 is opened, closes the supply passageway 44；And control unit 55, The control unit 55 switches over gas discharging operation and gas supply action, in the gas discharging operation, the control Portion 55 by the exhaust with switch valve 72 control be in an open state and by the supply side switch valve 73 control be in off state come The generated nitrogen-rich air is arranged outside the case of the container 11, in the gas supply action, the control unit 55 The exhaust is in off state with the control of switch valve 72 and is in an open state the supply side switch valve 73 control will The nitrogen-rich air generated is fed in the case of the container 11.

In the fourth aspect of the disclosure, once the control of exhaust switch valve 72 is in an open state by control unit 55, and And be in off state the control of supply side switch valve 73, with regard to carrying out gas discharging operation, in the gas discharging operation, generation Nitrogen-rich air all from supply passageway 44 via exhaust with connecting path 71 flow into oxygen drain passageway 45 in after, with oxygen-enriched air one It rises and is discharged to outside case.On the other hand, once being in off state the control of exhaust switch valve 72 by control unit 55, and will supply The control of side switch valve 73 is in an open state, with regard to carrying out gas supply action, in the gas supply action, the nitrogen-rich air of generation It is all supplied to via supply passageway 44 in the case of container 11.

The disclosure the 5th aspect be it is such, in the fourth aspect of the disclosure, conditioner packet in the case Include: the nitrogen-rich air flowed in the supply passageway 44 is guided into access 81 and is set by measurement access 81, the measurement It sets in the lambda sensor 51 in the case of the container 11；And measurement switch valve 82, the measurement switch valve 82 are set It sets on the measurement access 81, and opens, closes the measurement access 81, the control unit 55 is configured to carry out gas supply survey Amount movement, in gas supply measurement movement, the control unit 55 is by exhaust switch valve 72 and the supply side switch valve 73 controls are in off state, and the measurement switch valve 82 control is in an open state, to allow the lambda sensor 51 The oxygen concentration of the nitrogen-rich air is measured.

In the 5th aspect of the disclosure, by the way that the control of measurement switch valve 82 is in an open state, and by supply side Switch valve 73 and the control of exhaust switch valve 72 are in off state, so that nitrogen-rich air will not be flowed in supply passageway 44 than supplying The part of side switch valve 73 farther downstream is given, the nitrogen-rich air thus flowed in supply passageway 44 is all via measurement access 81 are led in lambda sensor 51.As a result, being measured by oxygen concentration of the lambda sensor 51 to nitrogen-rich air.

6th aspect of the disclosure is a kind of freezer for container, is mounted on the plant 15 that storage is breathed On container 11, the freezer for container includes: refrigerant circuit 20, and the refrigerant circuit 20 carries out refrigeration cycle To be cooled down to air in the case in the container 11；And conditioner 60 in case, air conditioning in the case Device 60 has gas supply device 30 and exhaust portion 46, and the composition of air in the case in the container 11 is adjusted, Wherein, which generates nitrogen concentration is higher than air and oxygen concentration is lower than air nitrogen-rich air, and by the richness nitrogen Air is fed in the case of the container 11, which arranges air in the case in the container 11 outside case, described Freezer for container be used to for the temperature of air in the case in the container 11 and composition being adjusted to desired temperature and Composition, in the case conditioner 60 as the disclosure the first to the 5th aspect in air tune in case described in either side Regulating device 60 is constituted.

In the 6th aspect of the disclosure, by carrying out refrigeration cycle in refrigerant circuit 20, thus in container 11 Case in air cooled down.In addition, by the way that the nitrogen-rich air generated in conditioner 60 in the case is fed to container In 11, so that the composition of air is adjusted in case in container 11.

The effect of invention-

According to the disclosure in a first aspect, conditioner 60 in case is configured to carry out part supplying operation, at this In the supplying operation of part, not by until playing by the stipulated time since desorption movement at the time of in a period of the richness that generates Nitrogen air feeds in the case of container 11 and arranges the nitrogen-rich air outside case, and only desorption will be arrived after the stipulated time The nitrogen-rich air generated in a period of until at the time of movement terminates is fed in the case of container 11.By carrying out above-mentioned part confession To operating, arranged in the case that the higher nitrogen-rich air of oxygen concentration that desorption movement initial stage generates just is not supplied to container 11 To outside case, thus, it is possible to only feed to oxygen concentration lower nitrogen-rich air in the case of container 11, wherein the oxygen concentration is lower Nitrogen-rich air is will to generate after the outer air discharge of the case remained in absorbing cylinder 34,35, pipeline etc..Therefore, according in the case The oxygen concentration of air in case in container 11 can be adjusted to than alternately absorption and act reconciliation by conditioner 60 Suction movement and the low concentration of oxygen concentration average value (hereinafter referred to as " oxygen mean concentration ") of nitrogen-rich air generated.

According to the second aspect of the disclosure, conditioner 60 in case is constituted are as follows: empty in the case in container 11 The oxygen concentration of gas be reduced to normal concentration or less it is pervious during, carry out the nitrogen-rich air that will be generated in desorption acts whole Whole supplying operations in the case of container 11 are fed to, and when the oxygen concentration of air in the case in container 11 is reduced to regulation After below concentration, then the higher nitrogen-rich air of oxygen concentration will generate at desorption movement initial stage is discharged and only by oxygen concentration Lower nitrogen-rich air feeds to the part supplying operation in the case of container 11.As described above, empty in the case in container 11 When the oxygen concentration of gas is higher, compared with the oxygen concentration for feeding to the nitrogen-rich air in case, pay the utmost attention to feed to the nitrogen-rich air in case Supply amount, therefore the nitrogen-rich air generated in desorption acts all fed in the case of container 11, thus it enables that collection The oxygen concentration of air promptly reduces in case in vanning 11.On the other hand, when the oxygen concentration of air in the case in container 11 After being declined, compared with the supply amount for feeding to the nitrogen-rich air in case, the oxygen for paying the utmost attention to feed to the nitrogen-rich air in case is dense Degree, therefore only feed to oxygen concentration lower nitrogen-rich air in the case of container 11, so as to make in the case in container 11 The oxygen concentration of air drops to lower concentration.

Extended as the oxygen concentration of air in the case in container 11 declines in part according to the third aspect of the disclosure Nitrogen-rich air is arranged into the efflux time outside the case of container 11 in supplying operation.So, in the case in container 11 When the oxygen concentration of air is higher, compared with the oxygen concentration for feeding to the nitrogen-rich air in case, the rich nitrogen for paying the utmost attention to feed in case is empty The supply amount of gas, therefore not only feed to oxygen concentration extremely low nitrogen-rich air in container 11, but also oxygen concentration is slightly high Nitrogen-rich air feed in container 11, thus it enables that the oxygen concentration of air promptly reduces in the case in container 11.Separately On the one hand, after the oxygen concentration of air in the case in container 11 is declined, and the nitrogen-rich air in container 11 casees is fed to Supply amount compare, pay the utmost attention to the oxygen concentration for feeding to the nitrogen-rich air in container 11 casees, therefore only that oxygen concentration is lower Nitrogen-rich air is fed in the case of container 11, lower so as to drop to the oxygen concentration of air in the case in container 11 Concentration.

It according to the fourth aspect of the disclosure, is provided with: the exhaust that supply passageway 44 and oxygen drain passageway 45 are connected With connecting path 71；Exhaust switch valve 72；Supply side switch valve 73；And control unit 55, the control unit 55 control exhaust are used The opening and closing of switch valve 72 and supply side switch valve 73 switch gas supply action and gas discharging operation.According to this Disclosed fourth aspect, using this simple structure, by only switching over exhaust switch valve 72 and supply side switch valve 73 on and off simply controls in this way, it will be able to be easy to carry out by the way that gas supply action and gas is discharged The part supplying operation of movement switching and realization.

According to the 5th of the disclosure the aspect, it is provided with measurement access 81 and measurement switch valve 82, wherein the measurement is used The nitrogen-rich air that access 81 flows into supply passageway 44 after generating in conditioner 60 in the case, which is guided into, to be arranged in packaging In lambda sensor 51 in case 11 casees, which makes measurement access 81 open, close.According to this structure, The control of measurement switch valve 82 is in an open state by control unit 55, and exhaust switch valve 72 and supply side switch valve 73 are controlled It is made as closed state, and the nitrogen-rich air flowed in supply passageway 44 is guided into lambda sensor 51 from measurement access 81, Thus allow for measuring the gas supply measurement movement of the oxygen concentration of the nitrogen-rich air.In addition, being surveyed by carrying out gas supply measurement movement Measure the oxygen concentration of nitrogen-rich air, can to the performance of conditioner 60 in case, that is whether generate desired nitrogen The nitrogen-rich air of concentration is detected.That is, measuring air in container 11 casees by using oxygen concentration sensor 51 Oxygen concentration, to be not provided with also being able to detect in the case where nitrogen concentration sensor in the case in conditioner 60 in outlet empty The bad phenomenon of gas control device 60.

According to the 6th of the disclosure the aspect, using conditioner 60 in the case for carrying out part supplying operation, at this In the supplying operation of part, not by until playing by the stipulated time since desorption movement at the time of in a period of the richness that generates Nitrogen air feeds in the case of container 11 and arranges the nitrogen-rich air outside case, and only desorption will be arrived after the stipulated time The nitrogen-rich air generated in a period of until at the time of movement terminates is fed in the case of container 11.As described above, being in case In the nitrogen-rich air generated in conditioner 60, arranged in the higher nitrogen-rich air of oxygen concentration that desorption movement initial stage generates To outside case, therefore, the lower rich nitrogen of the oxygen concentration generated after only the higher nitrogen-rich air of the oxygen concentration can be discharged to outside case Air is fed in the case of container 11.Therefore, the oxygen concentration of air in the case in container 11 can be adjusted to be averaged than oxygen The low oxygen concentration of concentration.

Detailed description of the invention

Fig. 1 is the perspective view of the freezer for container for the first embodiment seen on the outside of case.

Fig. 2 is side sectional view, shows the brief configuration of the freezer for container of first embodiment.

Fig. 3 is piping diagram, shows the knot of the refrigerant circuit of the freezer for container of first embodiment Structure.

Fig. 4 is piping diagram, shows the structure of the CA device of the freezer for container of first embodiment, and The flow condition of air in first movement is shown.

Fig. 5 is piping diagram, shows the structure of the CA device of the freezer for container of first embodiment, and The flow condition of air in second movement is shown.

Fig. 6 is piping diagram, shows the structure of the CA device of the freezer for container of first embodiment, and The flow condition for pressing the air in making is shown.

Fig. 7 is piping diagram, shows the structure of the CA device of the freezer for container of first embodiment, and The flow condition of air in gas discharging operation is shown.

Fig. 8 is piping diagram, shows the structure of the CA device of the freezer for container of first embodiment, and The flow condition of air in gas supply measurement movement is shown.

Fig. 9 is timing diagram, and the CA device for showing the freezer for container of first embodiment is generated in gas to be moved Vavle switching moment in work and the state in absorbing cylinder.

Figure 10 is timing diagram, shows the CA device of the freezer for container of first embodiment in the first operational mode The Vavle switching moment under formula.

Figure 11 is timing diagram, shows the CA device of the freezer for container of first embodiment in the second operational mode The Vavle switching moment under formula.

Figure 12 is timing diagram, shows the CA device of the freezer for container of second embodiment in third operational mode The Vavle switching moment under formula.

Figure 13 is piping diagram, shows the structure of the CA device of the freezer for container of third embodiment, And state when stopping is shown.

Figure 14 is curve graph, shows the oxygen concentration of the nitrogen-rich air generated by conditioner in existing case at any time Between situation of change.

Specific embodiment

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.It should be noted that following preferred embodiment It is merely illustrative in itself, it is not intended to limit the range of the present invention, its application or its purposes.

(first embodiment of the invention)

As depicted in figs. 1 and 2, the container 11 for transporting by sea etc. is arranged in freezer for container 10, and to this Air is cooled down in case in container 11.Plant 15 is accommodated in the case of container 11 with the state in box.Plant 15 carry out the oxygen (O in absorption air₂) and discharge carbon dioxide (CO₂) such breathing, plant 15 is, for example, banana, avocado etc. Vegetables and fruits, green vegetables, cereal, bulb, fresh flower etc..

Container 11 is formed as the open elongated box-like in end face of side.Freezer for container 10 include shell 12, Refrigerant circuit 20 and CA device (conditioner/Controlled Atmosphere System in case) 60, packaging Case is mounted on container 11 in a manner of sealing the open end of container 11 with refrigerating plant 10.

< shell >

As shown in Fig. 2, shell 12 includes box outer wall 12a and chamber interior wall 12b, box outer wall 12a is located at the case of container 11 Outside, chamber interior wall 12b are located on the inside of the case of container 11.Box outer wall 12a and chamber interior wall 12b are for example made of aluminium alloy.

On the peripheral part for the opening that box outer wall 12a is mounted on container 11 in a manner of sealing the open end of container 11. Box outer wall 12a is formed as its underpart to bulging on the inside of the case of container 11.

Chamber interior wall 12b is arranged to opposed with box outer wall 12a.Chamber interior wall 12b corresponding to box outer wall 12a lower part and into case Side bulging.Heat-insulating material 12c is provided in the space between wall 12b and box outer wall 12a in the case.

As described above, the lower part of shell 12 is formed as to bulging on the inside of the case of container 11.As a result, in the lower part of shell 12 , the outer storage space S1 of case is formed on the outside of the case of container 11, formed on the inside of the top of shell 12, container 11 case There is storage space S2 in case.

As shown in Figure 1, being formed with two of the guarantee being arranged along the width direction of shell 12 on housing 12 Guarantee opening 14.Two guarantee with opening 14 respectively by be opened and closed freely first guarantee door 16A and second guarantee door 16B close Firmly.Any one of first guarantee door 16A and the second guarantee door 16B are all in the same manner as shell 12 by box outer wall, chamber interior wall and insulation Material is constituted.

As shown in Fig. 2, being disposed with partition 18 in the case of container 11.The partition 18 is by generally rectangular shaped plate component structure At the partition 18 is erect in the form of opposed with the face on the inside of the case of the container 11 of shell 12 to be arranged.By the partition 18 every Storage space S2 in the case of container 11 and in case out.

Suction inlet 18a is formed between the top surface in the upper end and container 11 of partition 18.In case in container 11 Air is inhaled into case in storage space S2 via suction inlet 18a.

In addition, the partition wall 13 extended along horizontal direction is provided in storage space S2 in the case.Partition wall 13 is installed In the upper end of partition 18, the opening for aftermentioned box fan 26 is arranged is formed on partition wall 13.The partition wall 13 is by case Interior storage space S2 is divided into the secondary sky of the primary space S21 of the suction side of box fan 26 and the blowout side of box fan 26 Between S22.It should be noted that in the present embodiment, storage space S2 is divided into upper and lower two skies by partition wall 13 in case Between, the primary space S21 of suction side is formed in upside, and the quadratic space S22 for blowing out side is formed in downside.

It is provided with bottom plate 19 in container 11, gap is equipped between the bottom plate 19 and the bottom surface of container 11.It has filled Plant 15 in box is placed on bottom plate 19.Flow path under bottom plate is formed between the bottom surface in container 11 and bottom plate 19 19a.Gap is equipped between the bottom surface in the lower end and container 11 of partition 18, which is connected to flow path 19a under bottom plate.

It is formed with blow-off outlet 18b at the inboard (being right side in Fig. 2) by container 11 on bottom plate 19, the blow-off outlet 18b is used to blow out into the case of container 11 to have passed through the cooled air of freezer for container 10.

The construction and arrangement > of < refrigerant circuit etc.

As shown in figure 3, refrigerant circuit 20 is by refrigerant tubing 20a by compressor 21, condenser 22,23 and of expansion valve Evaporator 24 is connected in turn and the loop that constitutes.

Case external fan 25 is equipped near condenser 22, which is driven by case external fan motor 25a and revolved Turn, for being sent to condenser guide the air (the outer air of case) of the case external space of container 11 in the outer storage space S1 of case into after 22.In condenser 22, the refrigerant flowed to inside condenser 22 after being pressurizeed by compressor 21 is sent to by case external fan 25 Heat exchange is carried out between the outer air of the case of condenser 22.In present embodiment, case external fan 25 is made of propeller fan.

There are two box fans 26 for setting near evaporator 24, and the box fan 26 is by box fan motor 26a drives and rotates, and for the air out of suction inlet 18a is introduced in container 11 case and air in case is blowed to evaporator 24.In evaporator 24, the refrigerant flowed to inside evaporator 24 after the decompression of inflated valve 23 is sent to by box fan 26 Heat exchange is carried out in the case of evaporator 24 between air.

As shown in Fig. 2, box fan 26 has propeller fan (rotating vane) 27a, multiple stator blade 27b, Yi Jifeng Fan case 27c.Propeller fan 27a and box fan motor 26a links, around the shaft by box fan motor 26a driving Rotation, thus along axial-feeding-air.Multiple stator blade 27b are located at the blowout side of propeller fan 27a, to propeller fan 27a The rotary air stream of blowout is rectified.Fan hub 27c on inner peripheral surface by being equipped with the cylinder part structure of multiple stator blade 27b At fan hub 27c extends to the periphery of propeller fan 27a, so that propeller fan 27a be fenced up.

As shown in Figure 1, compressor 21 and condenser 22 are accommodated in the outer storage space S1 of case.Condenser 22 is arranged are as follows: Storage space S1 outside the case is divided into the first space S 11 of downside by the center portion in the up and down direction of the outer storage space S1 of case With the second space S12 of upside.It is equipped in the first space S 11: above-mentioned compressor 21；It is accommodated with for the side of speed variable Formula drives the frequency converter box 29 of the driving circuit of the compressor 21；And the gas supply device 30 of CA device 60.On the other hand, Case external fan 25 and electronic component case 17 are equipped in second space S12.The case external space of first space S 11 to container 11 It opens wide, in contrast, to only have the blow-off outlet of case external fan 25 to open wide to the case external space between second space S12 and the case external space Mode by plate-shaped member close come.

On the other hand, as shown in Fig. 2, evaporator 24 is stored in the quadratic space S22 of storage space S2 in the case.In the case It is equipped at the position of the top of evaporator 24 in storage space S2 in two casees arranged along the width direction of shell 12 Fan 26.

< CA device >

Shown in Fig. 4, CA device 60 includes gas supply device 30, exhaust portion 46, sensor unit 50 and control unit 55, CA device 60 is used to the oxygen concentration and gas concentration lwevel of air in the case in regulating container 11.It should be noted that with Under explanation used in " concentration " all refer to " volumetric concentration ".

[gas supply device]

The structure-of gas supply device

Gas supply device 30 is the dress for generating the nitrogen-rich air for feeding to the low oxygen concentration in container 11 casees It sets.In the present embodiment, gas supply device 30 is by utilizing Vacuum Pressure Swing Adsorption (Vacuum Pressure Swing Adsorption, VPSA) method device constitute.In addition, as shown in Figure 1, gas supply device 30, which is arranged in outside case, stores sky Between S1 lower left corner.

As shown in figure 4, gas supply device 30 has air loop 3 and unit housings 36.It is connected in the air loop 3 Following component parts, it may be assumed that air pump 31；First direction control valve 32 and second direction control valve 33；And it is provided with for adsorbing The first absorbing cylinder 34 and the second absorbing cylinder 35 of the adsorbent of nitrogen component in air.The unit housings 36 store the air loop 3 component parts.As described above, gas supply device 30 is made up of the inside that its component parts is accommodated in unit housings 36 For a unit, the mode so as to fill later is installed on freezer for container 10.

(air pump)

Air pump 31 is located in unit housings 36, and has the first pump machanism (pressurization part) 31a and the (decompression of the second pump machanism Portion) 31b, the first pump machanism 31a and second pump machanism 31b extract after air is pressurizeed respectively and spray.First pump machanism The driving axis connection of 31a and the second pump machanism 31b and motor 31c, are driven and rotated by motor 31c, thus the first pump machine Structure 31a and the second pump machanism 31b, which is extracted respectively after air is pressurizeed, to be sprayed.

The suction inlet of first pump machanism 31a is connect with one end of the outer air flue 41 of case, and the outer air flue 41 of the case is arranged Make the inside and outside connection of unit housings 36 for penetrating element shell 36.It is arranged on the other end of air flue 41 outside case There is molecular filter 76, which has gas permeability and waterproofness.The outer air flue 41 of case is made of flexible pipe.Equipped with molecular filter The other end of the outer air flue 41 of 76 case is arranged in outside case in storage space S1 in the second space S12 of 22 top of condenser, Illustration omitted.According to this structure, the first pump machanism 31a sucks the outer air of case as described below and pressurizes, outside the case Air is flowing into unit housings 36 via the molecular filter 76 being located at outside case on the other end of air flue 41 outside unit housings 36 Moisture has been removed when interior.On the other hand, the one end for spraying access 42 is connect with the ejiction opening of the first pump machanism 31a.The ejection The other end of access 42 is connect with first direction control valve 32 and second direction control valve 33 respectively after downstream side is divided into two.

The one end for extracting access 43 is connect with the suction inlet of the second pump machanism 31b.The other end of the extraction access 43 is upper Trip side is connect with first direction control valve 32 and second direction control valve 33 respectively after being divided into two.On the other hand, supply passageway 44 one end is connect with the ejiction opening of the second pump machanism 31b.The other end of supply passageway 44 open ports in quadratic space S22, Quadratic space S22 is located at the blowout side of the box fan 26 in the case of container 11 in storage space S2.In supply passageway 44 The other end be provided with check-valves 65,65 permission air of the check-valves are flowed from one end towards the other end, and prevent sky Gas is flow backwards.

It should be noted that in the present embodiment, spraying access 42 and extraction access 43 being connected by bypass path 47 Come.By-pass switch valve 48 is located on bypass path 47, wherein open and close are played in the control that the by-pass switch valve 48 is controlled portion 55 It closes.

The the first pump machanism 31a and the second pump machanism 31b of air pump 31 without using the oil-less pump of lubrication oil by constituting.In gas The side of pump 31 is set there are two Air Blast fan 49, and the Air Blast fan 49 is used for by blowing to air pump 31 that air pump 31 is cold But.

(directional control valve)

Portion on air loop 3, between air pump 31 and the first absorbing cylinder 34 is arranged in first direction control valve 32 On point, part on air loop 3, between air pump 31 and the second absorbing cylinder 35 is arranged in second direction control valve 33 On.The first direction control valve 32 and the second direction control valve 33 are used to air pump 31 and the first absorbing cylinder 34 and the second absorption The connection status of cylinder 35 is switched to aftermentioned three connection status (first~third connection status).The switching action is by control unit 55 Control.

Specifically, first direction control valve 32 and the one end for spraying access 42, extracting access 43, the first absorbing cylinder 34 (inflow entrance when pressurization) connection, the ejection access 42 are the accesses connecting with the ejiction opening of the first pump machanism 31a, and the extraction is logical Road 43 is the access connecting with the suction inlet of the second pump machanism 31b.The first direction control valve 32 (shows in first state in Fig. 4 State out) and the second state (state shown in Fig. 5) between switch.In the first state, the first direction control valve 32 are connected to the first absorbing cylinder 34 and the ejiction opening of the first pump machanism 31a, and make the first absorbing cylinder 34 and the second pump machanism 31b Suction inlet it is separated.In this second state, which makes the first absorbing cylinder 34 and the second pump machanism The suction inlet of 31b is connected to, and makes the separated of the first absorbing cylinder 34 and the ejiction opening of the first pump machanism 31a.

It second direction control valve 33 and sprays access 42, extract the one end of access 43, second absorbing cylinder 35 (when pressurization Inflow entrance) connection, which is the access connecting with the ejiction opening of the first pump machanism 31a, the extraction access 43 be with The access of the suction inlet connection of second pump machanism 31b.The second direction control valve 33 is in first state (state shown in Fig. 4) And second switch between state (state shown in Fig. 5).In the first state, which makes the second suction Attached cylinder 35 is connected to the suction inlet of the second pump machanism 31b, and make the ejiction opening of the second absorbing cylinder 35 and the first pump machanism 31a it It is separated.In this second state, which makes the ejiction opening of the second absorbing cylinder 35 and the first pump machanism 31a Connection, and make the separated of the second absorbing cylinder 35 and the suction inlet of the second pump machanism 31b.

If first direction control valve 32 and second direction control valve 33 are all set in first state, air loop 3 is just It is switched to the first connection status, under first connection status, the ejiction opening of the first pump machanism 31a and the first absorbing cylinder 34 connect It connects, and the suction inlet of the second pump machanism 31b is connect (referring to Fig. 4) with the second absorbing cylinder 35.Under first connection status, The absorption movement for carrying out making the nitrogen component in the outer air of adsorbent adsorption box in first absorbing cylinder 34, in the second absorbing cylinder 35 into Exercise the desorption movement that the nitrogen component being adsorbed in adsorbent desorbs.

If first direction control valve 32 and second direction control valve 33 are all set in the second state, air loop 3 is just It is switched to the second connection status, under second connection status, the ejiction opening of the first pump machanism 31a and the second absorbing cylinder 35 connect It connects, and the suction inlet of the second pump machanism 31b is connect (referring to Fig. 5) with the first absorbing cylinder 34.Under second connection status, Absorption movement is carried out in second absorbing cylinder 35, carries out desorption movement in the first absorbing cylinder 34.

If first direction control valve 32 is set in first state, and second direction control valve 33 is set in the second shape State, air loop 3 are just switched to third connection status, under the third connection status, the ejiction opening of the first pump machanism 31a and The connection of one absorbing cylinder 34, and the ejiction opening of the first pump machanism 31a is connect (referring to Fig. 6) with the second absorbing cylinder 35.In the third Under connection status, the first absorbing cylinder 34 and 35 both sides of the second absorbing cylinder are connect with the ejiction opening of the first pump machanism 31a, by first Pump machanism 31a supplies air outside the case after pressurization to the first absorbing cylinder 34 and 35 both sides of the second absorbing cylinder.Shape is connected in the third Under state, absorption movement is all carried out in the first absorbing cylinder 34 and the second absorbing cylinder 35.

(absorbing cylinder)

First absorbing cylinder 34 and the second absorbing cylinder 35 are made of the internal cylinder part filled with adsorbent.It is filled in first Adsorbent in absorbing cylinder 34 and the second absorbing cylinder 35 has following property, it may be assumed that adsorbs nitrogen component in the pressurized state, is subtracting Desorb the nitrogen component adsorbed in the state of pressure.

The adsorbent in the first absorbing cylinder 34 and the second absorbing cylinder 35 is filled in for example by having punctulate porous body zeolite It constitutes, the diameter of the pore is less than the molecular diameter (3.0 angstroms) of nitrogen molecular and is greater than the molecular diameter (2.8 of oxygen molecule Angstrom).If constituting adsorbent with the zeolite with such aperture, it will be able to adsorb the nitrogen component in air.

In addition, because there is cation, there are electric fields, to generate polarity in the pore of zeolite.Therefore, it boils Stone has the property of adsorbed water molecule isopolarity molecule.The nitrogen being not only in air as a result, is filled in 34 He of the first absorbing cylinder The absorption of adsorbent in second absorbing cylinder 35, be made of zeolite, and the moisture (vapor) in air is also filled in the Adsorbent absorption in one absorbing cylinder 34 and the second absorbing cylinder 35, being made of zeolite.Then, the water being adsorbed in adsorbent Divide and is desorbed out from adsorbent together with nitrogen component by desorption movement.Therefore, the nitrogen-rich air quilt of moisture is contained In the case for feeding to container 11, so as to the humidity in lift tank.In turn, it since adsorbent is regenerated, can seek Seek the long lifetime of adsorbent.

According to this structure, the outer air of the case after pressurization is supplied to the first absorbing cylinder 34 and second from air pump 31 and inhales Attached cylinder 35 is interior and the inside of the first absorbing cylinder 34 and the second absorbing cylinder 35 is pressurized, then the nitrogen component in the outer air of the case will be inhaled It is attached in adsorbent.As a result, generating oxygen-enriched air, the oxygen-enriched air is since nitrogen component is than little air outside case, so that nitrogen is dense It is higher than air outside case to spend and oxygen concentration lower than air outside case.On the other hand, once in the first absorbing cylinder 34 and the second absorbing cylinder 35 The air in portion is extracted away by air pump 31 and the inside of the first absorbing cylinder 34 and the second absorbing cylinder 35 is depressurized, then is adsorbed on absorption Nitrogen component in agent will desorb.As a result, generating nitrogen-rich air, the nitrogen-rich air than air outside case due to containing more More nitrogen component, so that nitrogen concentration is higher than air outside case and oxygen concentration is lower than air outside case.In the present embodiment, it such as generates Component ratio is the nitrogen-rich air of nitrogen concentration 92%, oxygen concentration 8%.

The other end (outflux when pressurization) of first absorbing cylinder 34 and the second absorbing cylinder 35 and oxygen drain passageway 45 One end connection, the oxygen drain passageway 45 are used to guide oxygen-enriched air into outside the case of container 11, which is will be by first After the outer air of the case that pump machanism 31a pressurizeed is supplied to the first absorbing cylinder 34 and the second absorbing cylinder 35, in first absorbing cylinder 34 With generate in second absorbing cylinder 35.One end of oxygen drain passageway 45 be divided into two after respectively with the first absorbing cylinder 34 and second The other end of absorbing cylinder 35 connects.Outside, that is, container 11 of the other end of oxygen drain passageway 45 in gas supply device 30 The outer open ports of case.Lead on the part of oxygen drain passageway 45 being connect with the other end of the first absorbing cylinder 34 and in oxygen discharge Check-valves 61 is respectively arranged on the part connecting with the other end of the second absorbing cylinder 35 on road 45, the check-valves 61 is used to Prevent air from flowing backwards from oxygen drain passageway 45 toward the first absorbing cylinder 34 and the second absorbing cylinder 35.

In the middle part of oxygen drain passageway 45, check-valves 62 is disposed with from one end of oxygen drain passageway 45 toward the other end With orifice plate 63.Check-valves 62 is used to prevent nitrogen-rich air from inhaling from aftermentioned exhaust connecting path 71 to the first absorbing cylinder 34 and second It flows backwards attached 35 side of cylinder.Orifice plate 63 is used to be discharged to outside case in the oxygen-enriched air flowed out from the first absorbing cylinder 34 and the second absorbing cylinder 35 The oxygen-enriched air was depressurized in the past.

(supply discharge switching mechanism)

It is provided on air loop 3 and is discharged for switching aftermentioned gas supply action (referring to Fig. 4 and Fig. 5) with gas The nitrogen-rich air of generation is fed to packaging in the gas supply action by the supply discharge switching mechanism 70 of movement (referring to Fig. 7) In the case of case 11, in the gas discharging operation, the nitrogen-rich air of generation is arranged outside case.Supply discharge switching mechanism 70 has Exhaust connecting path 71, exhaust switch valve 72 and supply side switch valve 73.

One end of exhaust connecting path 71 is connect with supply passageway 44, and the other end and oxygen of exhaust connecting path 71 are arranged Access 45 connects out.Exhaust is connected to the ratio orifice plate 63 on oxygen drain passageway 45 closer to outside case with the other end of connecting path 71 At the position of side.

Exhaust is arranged on exhaust connecting path 71 with switch valve 72.Exhaust is made of with switch valve 72 solenoid valve, should Solenoid valve switches between opening state and closed state in the exhaust middle part of connecting path 71, which exists The nitrogen-rich air for allowing to flow into from supply passageway 44 under the opening state flows, and blocks nitrogen-rich air stream in this closed condition It is dynamic.The on-off action of exhaust switch valve 72 is controlled by control unit 55.

Supply side switch valve 73 be arranged in it is on supply passageway 44, be connected than supply passageway 44 with exhaust connecting path 71 The interconnecting piece connect is closer at the position of another side (case on the inside of).Supply side switch valve 73 is made of solenoid valve, the solenoid valve Interconnecting piece on supply passageway 44, being connected with exhaust connecting path 71 than supply passageway 44 is closer to the position on the inside of case Place is set, is switched between opening state and closed state, which allows nitrogen-rich air to flow under the opening state On the inside of case, nitrogen-rich air is blocked to flow on the inside of case in this closed condition.The on-off action of supply side switch valve 73 is by control unit 55 controls.

(measuring unit)

The measuring unit 80 for carrying out gas supply measurement movement (referring to Fig. 8) is provided on air loop 3, wherein at this It supplies in measurement movement, utilizes the richness of 51 pairs of lambda sensor generations in the latter sensor unit 50 being located in container 11 casees The concentration of nitrogen air measures.Measuring unit 80 includes branched pipe (measurement access) 81 and measurement switch valve 82, measurement Unit 80 is configured to the richness nitrogen sky that makes the nitrogen-rich air flowed in supply passageway 44 distribute a part and will be diverted Gas is guided into lambda sensor 51.

Specifically, one end of branched pipe 81 is connect with supply passageway 44, the other end and lambda sensor 51 of branched pipe 81 Aftermentioned lambda sensor box 51a connection.It should be noted that in the present embodiment, branched pipe 81 in unit housings 36 from Supply passageway 44 is branched off, and is arranged to from the internal stretch of unit housings to outside.

Measurement switch valve 82 is arranged on the part of branched pipe 81 being located inside unit housings.Measurement switch valve 82 It is made of the solenoid valve switched between opening state and closed state, which allows nitrogen-rich air under the opening state It is flowed in branched pipe 81, blocks nitrogen-rich air to flow in branched pipe 81 in this closed condition.Measurement switch valve 82 On-off action is controlled by control unit 55.Opening is switched to when the gas supply measurement movement that measurement is only stated after execution with switch valve 82 State, then switching is in off state under other modes, and details are aftermentioned.

The motion-of gas supply device

(gas generation movement)

In gas supply device 30, just alternately it is repeated by (such as 14.5 seconds) at intervals of set time following First movement (referring to Fig. 4) and the second movement (referring to Fig. 5), so that nitrogen-rich air and oxygen-enriched air are generated, in first movement Under, while the first absorbing cylinder 34 is pressurized, the second absorbing cylinder 35 is depressurized, under second movement, in the first absorbing cylinder 34 while be depressurized, and the second absorbing cylinder 35 is pressurized.In addition, in the present embodiment, in the first movement and the second movement Between carry out respectively the first absorbing cylinder 34 and the second absorbing cylinder 35 it is all pressurized press works (reference Fig. 6) stipulated time (such as 1.5 seconds) (referring to Fig. 9).By operating first direction control valve 32 and second direction control valve 33 by control unit 55, and carry out each Switching between movement.

(the first movement)

In the first movement, first direction control valve 32 and second direction control valve 33 are all switched to Fig. 4 by control unit 55 Shown in first state.Air loop 3 enters the first connection status as a result, under first connection status: the first absorbing cylinder 34 be connected to the ejiction opening of the first pump machanism 31a and the first absorbing cylinder 34 and the suction inlet of the second pump machanism 31b it is separated, and And second absorbing cylinder 35 be connected to the suction inlet of the second pump machanism 31b and the ejection of the second absorbing cylinder 35 and the first pump machanism 31a Mouthful it is separated.

Air outside case after pressurization is fed to the first absorbing cylinder 34 by the first pump machanism 31a.It is flowed into the first absorbing cylinder 34 Air contained in nitrogen component by the first absorbing cylinder 34 adsorbent adsorb.As described above, in the first movement, after pressurization The outer air of case feed to the first absorbing cylinder 34 from the first pump machanism 31a, the nitrogen component in the outer air of the case is adsorbed agent suction Attached, to generate oxygen-enriched air in the first absorbing cylinder 34, the nitrogen concentration of the oxygen-enriched air is lower than air outside case and oxygen concentration ratio The outer air of case is high.Oxygen-enriched air flows to oxygen drain passageway 45 from the first absorbing cylinder 34.

On the other hand, the second pump machanism 31b extracts air from the second absorbing cylinder 35.At this moment, it is adsorbed on the second absorbing cylinder The nitrogen component in adsorbent in 35 is extracted by the second pump machanism 31b together with air and is desorbed from adsorbent.As above Described, in the first movement, the air inside the second absorbing cylinder 35 is extracted by the second pump machanism 31b, is adsorbed in adsorbent Nitrogen component desorbs, to generate nitrogen-rich air in the second absorbing cylinder 35, which contains is solved from adsorbent The nitrogen concentration of the nitrogen component sucked out, the nitrogen-rich air is higher than air outside case and oxygen concentration is lower than air outside case.Nitrogen-rich air quilt After second pump machanism 31b sucking and pressurization, it is ejected towards supply passageway 44.

(the second movement)

In the second movement, first direction control valve 32 and second direction control valve 33 are all switched to Fig. 5 by control unit 55 Shown in the second state.Air loop 3 enters the second connection status as a result, under second connection status: the first absorbing cylinder 34 be connected to the suction inlet of the second pump machanism 31b and the first absorbing cylinder 34 and the ejiction opening of the first pump machanism 31a it is separated, and And second absorbing cylinder 35 be connected to the ejiction opening of the first pump machanism 31a and the sucking of the second absorbing cylinder 35 and the second pump machanism 31b Mouthful it is separated.

Air outside case after pressurization is fed to the second absorbing cylinder 35 by the first pump machanism 31a.It is flowed into the second absorbing cylinder 35 Air contained in nitrogen component by the second absorbing cylinder 35 adsorbent adsorb.As described above, in the second movement, after pressurization The outer air of case feed to the second absorbing cylinder 35 from the first pump machanism 31a, the nitrogen component in the outer air of the case is adsorbed agent suction Attached, to generate oxygen-enriched air in the second absorbing cylinder 35, the nitrogen concentration of the oxygen-enriched air is lower than air outside case and oxygen concentration ratio The outer air of case is high.Oxygen-enriched air flows to oxygen drain passageway 45 from the second absorbing cylinder 35.

On the other hand, the second pump machanism 31b extracts air from the first absorbing cylinder 34.At this moment, it is adsorbed on the first absorbing cylinder The nitrogen component in adsorbent in 34 is extracted by the second pump machanism 31b together with air and is desorbed from adsorbent.As above Described, in the second movement, the air inside the first absorbing cylinder 34 is extracted by the second pump machanism 31b, is adsorbed in adsorbent Nitrogen component desorbs, to generate nitrogen-rich air in the first absorbing cylinder 34, which contains is solved from adsorbent The nitrogen concentration of the nitrogen component sucked out, the nitrogen-rich air is higher than air outside case and oxygen concentration is lower than air outside case.Nitrogen-rich air quilt After second pump machanism 31b sucking and pressurization, it is ejected towards supply passageway 44.

(pressing work)

As shown in fig. 6, first direction control valve 32 is switched to first state by control unit 55, another pressing in work Aspect, second direction control valve 33 are switched to the second state by control unit 55.Air loop 3 is in third connection status as a result, Under the third connection status, the first absorbing cylinder 34 and the second absorbing cylinder 35 be all connected to the ejiction opening of the first pump machanism 31a and It is separated with the suction inlet of the second pump machanism 31b.

First pump machanism 31a supplies air outside the case after pressurization to the first absorbing cylinder 34 and 35 both sides of the second absorbing cylinder.Stream Enter to nitrogen component contained in the air in the first absorbing cylinder 34 and the second absorbing cylinder 35 by the first absorbing cylinder 34 and the second absorption The adsorbent absorption of cylinder 35, to generate oxygen-enriched air.Oxygen-enriched air is arranged from the first absorbing cylinder 34 and the second absorbing cylinder 35 to oxygen Access 45 flows out out.

On the other hand, the second pump machanism 31b and the first absorbing cylinder 34 and the second absorbing cylinder 35 is separated.As a result, equal It presses in work, new nitrogen-rich air will not be generated in the first absorbing cylinder 34 and the second absorbing cylinder 35, the second pump machanism 31b is extracted After remaining in the nitrogen-rich air extracted in access 43 and pressurizeing to it, the nitrogen-rich air after pressurization is sprayed into supply passageway 44。

As described above, being pressurizeed in the first absorbing cylinder 34 by the first pump machanism 31a in the first movement and carrying out absorption and move Make, is depressurized in the second absorbing cylinder 35 by the second pump machanism 31b and carry out desorption movement.On the other hand, in the second movement, It is pressurizeed by the first pump machanism 31a in second absorbing cylinder 35 and carries out absorption movement, by the second pump machanism in the first absorbing cylinder 34 31b is depressurized and is carried out desorption movement.As a result, if being switched to the second movement from the first movement without above-mentioned press, or It is switched to the first movement from the second movement without above-mentioned press, then at the end of switching is rigid, was desorbed before switching Pressure in the absorbing cylinder of movement is extremely low, therefore, in order to which the pressure improved in the absorbing cylinder can spend the time, cannot carry out immediately Absorption movement.

Then, in the present embodiment, from first movement be switched to the second movement when, and from second movement cut When being changed to the first movement, air loop 3 is switched to third connection status, thus via first direction control valve 32 and second Directional control valve 33 is connected to the first absorbing cylinder 34 with the second absorbing cylinder 35.First absorbing cylinder 34 and the second absorbing cylinder 35 as a result, Mutual internal pressure quickly become equal pressure (pressure for becoming the centre of mutual internal pressure).Pass through progress Above-mentioned presses work, thus in the absorbing cylinder for being depressurized before switching by the second pump machanism 31b and carrying out desorption movement Pressure can promptly rise, therefore after connecting with the first pump machanism 31a, can promptly carry out absorption movement.

As described above, being alternately repeated in gas supply device 30 and being pressed work in the first movement and second Switching between movement, to generate nitrogen-rich air and oxygen-enriched air in air loop 3.

(gas supply action/gas discharging operation)

In gas supply device 30, gas supply action is switched by supply discharge switching mechanism 70 and gas is discharged and moves Make, in the gas supply action, in case that the nitrogen-rich air generated in air loop 3 is fed to container 11, in the gas In body discharging operation, container will not be fed in the nitrogen-rich air generated out of desorption movement start time starts stipulated time The nitrogen-rich air is discharged in 11 case.

(gas supply action)

In gas supply action, it is in off state the control of exhaust switch valve 72 by control unit 55, and make to supply The control of side switch valve 73 is in an open state.The rich nitrogen alternately produced in the first absorbing cylinder 34 and the second absorbing cylinder 35 as a result, is empty Gas is supplied in the case of container 11 via supply passageway 44, and oxygen-enriched air is discharged to outside case via oxygen drain passageway 45.

(gas discharging operation)

As shown in fig. 7, the control of exhaust switch valve 72 is in an open state by control unit 55 in gas discharging operation, And it is in off state the control of supply side switch valve 73.It is alternately given birth in the first absorbing cylinder 34 and the second absorbing cylinder 35 as a result, The nitrogen-rich air being ejected towards in supply passageway 44 after is prevented from flowing in supply passageway 44 more to be leaned on than supply side switch valve 73 Part on the inside of case, and flow into exhaust connecting path 71.The nitrogen-rich air being flowed into exhaust connecting path 71 is subsequent It flows into oxygen drain passageway 45, is discharged to outside case together with the oxygen-enriched air flowed in oxygen drain passageway 45.

[exhaust portion]

The structure-of exhaust portion

As shown in Fig. 2, exhaust portion 46 includes the exhaust channel for connecting storage space S2 in case and the case external space 46a；The exhaust valve 46b being connect with exhaust channel 46a；And it is located on the inflow end (case medial end) of exhaust channel 46a Molecular filter 46c.Exhaust channel 46a is set as making the inside and outside connection of shell 12 through shell 12.Exhaust valve 46b is set It sets on the part being located on the inside of case on exhaust channel 46a, exhaust valve 46b between opening state and closed state by switching Solenoid valve constitute, which allows air to flow in exhaust channel 46a under the opening state, in this closed condition Air is blocked to flow in exhaust channel 46a.The on-off action of exhaust valve 46b is controlled by control unit 55.

The motion-of exhaust portion

In a period of fan 26 is rotated in the case, by the way that exhaust valve 46b is opened by control unit 55, thus carry out by Air (air in case) in the case being connected to in case in storage space S2 arranges the exhaust event outside case.

Specifically, box fan 26 1 rotates, the pressure for blowing out the quadratic space S22 of side will become to be above case outer space Between pressure (atmospheric pressure).As a result, when exhaust valve 46b is in an open state, generated between the both ends of exhaust channel 46a Pressure difference (pressure difference between the case external space and quadratic space S22) under the action of, with storage space in the case being connected in case Air (air in case) in S2 is discharged to the case external space via exhaust channel 46a.

[sensor unit]

The structure-of sensor unit

As shown in Fig. 2, the blowout side for being located at box fan 26 in storage space S2 in the case is arranged in sensor unit 50 In quadratic space S22.Sensor unit 50 have lambda sensor 51, carbon dioxide sensor 52, fixed plate 53, molecular filter 54, Connecting tube 56 and exhaust pipe 57.

Lambda sensor 51 has lambda sensor box 51a, is accommodated with primary cell type sensor inside lambda sensor box 51a. Lambda sensor 51 flows through the current value of the electrolyte of primary cell type sensor by measurement, to measure in lambda sensor box 51a Oxygen concentration in gas.The outer surface of lambda sensor box 51a is fixed in fixed plate 53.In the outer surface of lambda sensor box 51a In be formed with opening on the face of stationary plane opposite side that is fixed in fixed plate 53, be equipped with to have in the opening and breathe freely The molecular filter 54 of property and waterproofness.One end of connecting tube 56 links via a side of connector and lambda sensor box 51a.And And the branched pipe 81 of measuring unit 80 links via the lower surface of connector (pipe fitting) and lambda sensor box 51a.

Carbon dioxide sensor 52 has carbon dioxide sensor box 52a, which is non-spectral red Outer wire type (non dispersive infrared, NDIR) sensor, by the gas in carbon dioxide sensor box 52a Body irradiates infrared ray, and measures the amount of infrared ray of the carbon dioxide absorption with natural wavelength, to measure the titanium dioxide in gas Concentration of carbon.The other end of connecting tube 56 links via a side of connector and carbon dioxide sensor box 52a.In addition, row One end of tracheae 57 links via another side of connector and carbon dioxide sensor box 52a.

Fixed plate 53 is fixed in the state that lambda sensor 51 and carbon dioxide sensor 52 are installed in the fixed plate 53 Onto shell 12.

As described above, the side of the side and carbon dioxide sensor box 52a of connecting tube 56 and lambda sensor box 51a connects Knot, connecting tube 56 make the inner space of lambda sensor box 51a and the inner space of carbon dioxide sensor box 52a be interconnected.

As described above, one end of exhaust pipe 57 and another side of carbon dioxide sensor box 52a link, exhaust pipe 57 The other end in the case fan 26 suction inlet nearby open ports.That is, exhaust pipe 57 makes carbon dioxide sensor box 52a Inner space and case in storage space S2 primary space S21 be interconnected.

Measurement of concetration movement-

As described above, the quadratic space S22 and primary space S21 of storage space S2 are via by molecular filter 54, oxygen biography in case The sky that inner space, connecting tube 56, the inner space of carbon dioxide sensor box 52a and the exhaust pipe 57 of sensor box 51a is formed Gas access 58 is interconnected.In a period of fan 26 is rotated in the case as a result, the pressure of primary space S21 is lower than secondary The pressure of space S 22, thus under the action of its pressure difference, air is just passed in connection oxygen sensor 51 and carbon dioxide in case From quadratic space S22 effluent to the side primary space S21 in the air flue 58 of sensor 52.So, air successively leads in case Lambda sensor 51 and carbon dioxide sensor 52 are crossed, the oxygen concentration of air in case is measured by lambda sensor 51, is passed by carbon dioxide Sensor 52 measures the gas concentration lwevel of air in case.

[control unit]

Control unit 55, which is configured to execute, is adjusted to the oxygen concentration of air and gas concentration lwevel in the case in container 11 The concentration of desired concentration adjusts operating.Specifically, control unit 55 is according to lambda sensor 51 and carbon dioxide sensor 52 Testing result controls the movement of gas supply device 30 and exhaust portion 46, so as to the composition of air in the case in container 11 (oxygen concentration and gas concentration lwevel) becomes desired composition (for example, oxygen concentration 3%, gas concentration lwevel 5%).It is specific and Speech, control unit 55 are configured to execute aftermentioned first operation mode (whole supplying operations) (referring to Fig.1 0), the second operation mode (part supplying operation) (referring to Fig.1 1) and stop mode, wherein under first operation mode and second operation mode, It is acted by the gas generation that gas supply device 30 carries out (referring to Fig. 9), gas supply action (referring to Fig. 4~6), gas discharge It acts (referring to Fig. 7) and progress is combined by the exhaust event that exhaust portion 46 carries out, under the stop mode, supply gas Each movement of device 30 and exhaust portion 46 stops.

In addition, control unit 55 is moved according to instruction execution from the user gas supply measurement movement or the regularly measurement of execution gas supply Make, in gas supply measurement movement, the movement of control measurement switch valve 82 generates in gas supply device 30 to measure The oxygen concentration of nitrogen-rich air.

In the present embodiment, control unit 55 includes: to be disclosed for this application each element control of CA device 60 like that Microcomputer；And it is stored with executable memory, the hard disk of control program etc..It should be noted that the control unit 55 be an example of the control unit of CA device 60, and the detailed construction and algorithm of control unit 55 can be involved in the present invention for executing Function hardware and software any combination.

Motion-

The motion > of < refrigerant circuit

In the present embodiment, the unit control unit 100 as shown in Fig. 3 executes air in the case in container 11 is cold But cooling operating.

In cooling operating, pressure is controlled according to the testing result of temperature sensor (not shown) by unit control unit 100 The operating of contracting machine 21, expansion valve 23, case external fan 25 and box fan 26, so that the temperature of air reaches desired target in case Temperature.At this point, refrigerant circulation is in refrigerant circuit 20 to carry out steam compression type refrigerating circulation.Then, by case Air is when passing through evaporator 24 by the evaporator in the case in container 11 in 26 leading-in box of fan in storage space S2 The refrigerant of 24 internal flow is cooling.Air is by flow path 19a under bottom plate from blowing in case after being cooled in evaporator 24 Outlet 18b is blown to again in the case of container 11.Air is cooled in the case in container 11 as a result,.

< concentration adjusts operating >

In the present embodiment, under the control for the control unit 55 being shown in FIG. 4, CA device 60 carries out will be in container 11 Case in air composition (oxygen concentration and gas concentration lwevel) be adjusted to it is desired composition (for example, oxygen concentration 3%, titanium dioxide Concentration of carbon 5%) concentration adjust operating.It is adjusted in operating in concentration, control unit 55 is passed according to lambda sensor 51 and carbon dioxide The measurement result of sensor 52 controls the movement of gas supply device 30 and exhaust portion 46, so as to air in the case in container 11 Composition become desired composition.

It should be noted that adjusting in operating in concentration, the control of measurement switch valve 82 is in off state by control unit 55. In addition, adjusting in operating in concentration, control unit 55 is communicated with unit control unit 100, makes wind in case by the unit control unit 100 26 rotation of fan.Air by box fan 26 feeds to lambda sensor 51 and carbon dioxide sensor 52, lambda sensor 51 in case as a result, Measure the oxygen concentration and gas concentration lwevel of air in case respectively with carbon dioxide sensor 52.

(adjusting of oxygen concentration)

[the first operation mode]

When the oxygen concentration of air is higher than 8% in the case detected using lambda sensor 51, control unit 55 executes the first fortune Rotary-die type.

Under the first operation mode, as shown in figure 9, control unit 55 is to first direction control valve 32 and second direction control valve 33 switch over, and the switching for being pressed and being made between the first movement and the second movement is alternately repeated, and Lai Shengcheng nitrogen is dense Spend nitrogen-rich air (gas generation movement) higher than air outside case and lower than air outside case oxygen concentration.In the present embodiment, The actuation time of one movement and the actuation time of the second movement are respectively set as 14.5 seconds, and the actuation time for pressing work is set as 1.5 the second.

In addition, as shown in Fig. 4, Fig. 5, Figure 10, control unit 55 controls exhaust switch valve 72 under the first operation mode It is in off state, and the control of supply side switch valve 73 is in an open state to carry out gas supply action, it is dynamic in gas supply In work, it will be fed in the case of container 11 by carrying out the nitrogen-rich air that the gas generation movement generates.

It should be noted that the composition of the nitrogen-rich air generated at the initial stage of the first movement and the second each movement of movement and each The composition for the nitrogen-rich air that the latter stage of movement generates is not identical.Specifically, at the initial stage of each movement, since air remains outside case In absorbing cylinder, pipeline etc., thus generate the higher nitrogen-rich air of oxygen concentration；In the latter stage of each movement, due in absorbing cylinder Pressure ratio initial stage is low, and many nitrogen components are desorbed out, thus generates the lower nitrogen-rich air of oxygen concentration.In the first operation mode Under, in the first movement and second each movement of movement, the nitrogen-rich air of generation is all fed in the case of container 11.Its result It is that average nitrogen concentration (in each movement of the first movement and the second movement, feeds to being averaged for the nitrogen concentration of the nitrogen-rich air in case Value) 92% and oxygen mean concentration (first movement and second movement it is each act in, feed to the oxygen concentration of the nitrogen-rich air in case Average value) 8% nitrogen-rich air feeds in the case of container 11.

In addition, under the first operation mode, control unit 55 by the exhaust valve 46b control of exhaust portion 46 be in an open state into Row exhaust event, to arranging air in the case of following amounts outside case, which is equivalent to is supplied by carrying out gas supply action It is given to the amount of the nitrogen-rich air in container 11 casees.

Under the first operation mode, by gas supply action as described above and exhaust event, air is just set in case It is changed to nitrogen-rich air, the oxygen concentration decline of air in case.

[the second operation mode]

Once the oxygen concentration of air is reduced to 8% by carrying out the first operation mode in the case in container 11, control Portion 55 is carried out the second operation mode.

As shown in figure 9, control unit 55 also controls first direction as the first operation mode under the second operation mode Valve 32 and second direction control valve 33 switch over, and are alternately repeated to be pressed and make in the first movement and the second movement Between switching, (gas generates dynamic for Lai Shengcheng nitrogen concentration is higher than air outside case and oxygen concentration is lower than air outside case nitrogen-rich air Make).

On the other hand, as seen in figs. 7 and 11, under the second operation mode, control unit 55 is dynamic in the first movement and second Make in the stipulated time at the initial stage of each movement (in a period of after since each movement to by 4 seconds in present embodiment) The control of exhaust switch valve 72 is in an open state, and the control of supply side switch valve 73 is in off state to carry out gas discharge Movement will not feed to packaging by carrying out the nitrogen-rich air that the gas generation movement generates in the gas discharging operation The nitrogen-rich air is arranged outside case in the case of case 11.Then, after gas discharging operation, control unit 55 will be vented with opening It closes the control of valve 72 to be in off state, and the control of supply side switch valve 73 is in an open state to carry out gas supply action, at this In gas supply action, it will be fed in the case of container 11 by carrying out the nitrogen-rich air that the gas generation movement generates.

Under the second operation mode, by carrying out initial stage as described above, in the first movement and second each movement of movement Nitrogen-rich air is not fed in case and arrange the gas discharging operation outside case, to accomplish when just starting to carry out desorption movement The higher nitrogen-rich air of oxygen concentration will not be fed in the case of container 11.As a result, average nitrogen concentration 95% and oxygen are average dense The nitrogen-rich air of degree 5% is fed in the case of container 11.As described above, supply oxygen concentration is lower than under the second operation mode The nitrogen-rich air of the nitrogen-rich air in container 11 casees is fed under first operation mode.

In addition, under the second operation mode, control unit 55 is also as the first operation mode, by the exhaust valve of exhaust portion 46 46b control is in an open state that movement is exhausted, to arranging air in the case of following amounts outside case, which, which is equivalent to, passes through It carries out gas supply action and is supplied to the amount of the nitrogen-rich air in container 11 casees.

Under the second operation mode, by carrying out gas discharging operation before carrying out gas supply action, so as to Only the nitrogen-rich air that oxygen concentration is lower than the nitrogen-rich air supplied under the first operation mode is fed in the case of container 11.This Outside, by the way that movement is exhausted simultaneously with gas discharging operation and gas supply action, so as to be replaced into oxygen dense for air in case The nitrogen-rich air of lower (for example, oxygen mean concentration 5%) is spent, the oxygen concentration of air reduces in case.

[stop mode]

Once the oxygen concentration of air is reduced to 5% by carrying out the second operation mode in the case in container 11, control Portion 55 just makes gas supply device 30 shut down and stops gas supply action, and closes exhaust valve 46b and make to be vented Movement stops (stop mode).

Once gas supply action and exhaust event stop, any set would not be carried out to air in the case in container 11 It changes, on the other hand, plant 15 is breathed.Therefore, the oxygen concentration of air reduces in the case in container 11 and carbon dioxide is dense Degree rises.The oxygen concentration of air consequently reaches target oxygen concentration i.e. 3% in case as a result,.

It should be noted that being opened again if being lower than 3% by the oxygen concentration of air in the case in breathing container 11 Beginning carries out the operating of gas supply device 30, executes the first operation mode.Under the first operation mode, gas supply action is carried out And exhaust event.In the gas supply action, in case that the nitrogen-rich air of oxygen mean concentration 8% is fed to container 11.? In the exhaust event, the exhaust valve 46b control of exhaust portion 46 is in an open state movement is exhausted, thus by following amounts Air is arranged outside case in case, which is equivalent to the nitrogen-rich air being supplied in container 11 casees by carrying out gas supply action Amount.It is that oxygen concentration is higher than sky in the case by air displacement in case by carrying out above-mentioned gas supply action and exhaust event The nitrogen-rich air (for example, oxygen mean concentration 5%) of gas.Thus the oxygen concentration of air rises in the case in container 11.

Once in case the oxygen concentration of air reach than target oxygen concentration (3%) be also higher by a normal concentration (such as 0.5%) value (3.5%), control unit 55 just make gas supply device 30 shut down, and close exhaust valve 46b and make to arrange It is pneumatic to make to stop.

It should be noted that the adjusting of the oxygen concentration of air in case can also by carry out case outside air introducing movement and Exhaust event is realized, replacing the first operation mode.Air is introduced into movement outside the case, is opened by-pass switch valve 48, is allowed The outer air of case in air pump 31 is had been introduced to around the first absorbing cylinder 34 and the second absorbing cylinder 35, directly feeds to the case of container 11 It is interior；In the exhaust event, the exhaust valve 46b control of exhaust portion 46 is in an open state, thus by air in the case of following amounts It arranges outside case, which is equivalent to by carrying out air outside the case that air introducing movement is supplied in container 11 casees outside case Amount.As described above, air is just replaced into outside the case of oxygen concentration 21% in case by the outer air introducing movement of case and exhaust event Air.Thus the oxygen concentration of air rises in the case in container 11.

(adjusting of gas concentration lwevel)

When the gas concentration lwevel of air is higher than 5% in the case detected using carbon dioxide sensor 52, control unit 55 execute the first operation mode as shown in Figure 10.Under the first operation mode, gas supply action and exhaust event are carried out.? In the gas supply action, in case that the nitrogen-rich air of average nitrogen concentration 92% and oxygen mean concentration 8% is fed to container 11. In the exhaust event, the exhaust valve 46b control of exhaust portion 46 is in an open state movement is exhausted, thus by following amounts Case in air arrange outside case, which is equivalent to that be supplied to rich nitrogen in container 11 casees empty by carrying out gas supply action The amount of gas.By carrying out above-mentioned gas supply action and exhaust event, so that air displacement is gas concentration lwevel in case 0.03% nitrogen-rich air.Thus the gas concentration lwevel of air reduces in the case in container 11.

Once the gas concentration lwevel of air has reached also lower than target gas concentration lwevel (5%) regulation is dense in case The value (4.5%) of (such as 0.5%) is spent, control unit 55 just makes gas supply device 30 shut down and stop gas supply action Only, it and closes exhaust valve 46b and stops exhaust event.

It should be noted that can also be by opening by-pass switch valve 48 to the adjusting of the gas concentration lwevel of air in case It carries out the outer air introducing movement of the case and realizes, gas supply action is replaced with this.As described above, being introduced by the outer air of case Movement and exhaust event, air is just replaced into the outer air of case of gas concentration lwevel 0.03% in case.Thus in container 11 Case in air gas concentration lwevel reduce.

[gas supply measurement movement]

Control unit 55 executes measurement according to instruction from the user or regularly (such as every 10 days) and supplies dress in gas Set the gas supply measurement movement of the oxygen concentration of the nitrogen-rich air generated in 30.It should be noted that gas supply measurement movement is above-mentioned Concentration is adjusted in the gases supply actions such as operating, test running, is concurrently carried out when fan 26 stops rotating in the case.

Control unit 55 while being in an open state the control of measurement switch valve 82, will supply in gas supply action The control of side switch valve 73 is in off state.The nitrogen-rich air flowed in supply passageway 44 as a result, all flows into branched pipe 81. The nitrogen-rich air being flowed into branched pipe 81 subsequently flows into the lambda sensor box 51a of lambda sensor 51, and lambda sensor 51 measures Oxygen concentration.

As described above, measured by the oxygen concentration to the nitrogen-rich air generated in gas supply device 30, thus Whether the composition (oxygen concentration, nitrogen concentration) for being able to confirm that the nitrogen-rich air generated in gas supply device 30 is desired group At.

The effect-of first embodiment

As described above, CA device 60 is configured to carry out (the part supply of the second operation mode according to this first embodiment Operating), under second operation mode, will not since desorption movement at the time of play by the stipulated time until during The nitrogen-rich air of interior generation feeds in the case of container 11 and arranges the nitrogen-rich air outside case, and only will be when by regulation Between after until at the time of desorption movement end in a period of the nitrogen-rich air that generates feed to container 11 case in.By above-mentioned The second operation mode (part supplying operation), desorption movement initial stage generate the higher nitrogen-rich air of oxygen concentration be not supplied to It is discharged to outside case in the case of container 11, thus, it is possible to the lower nitrogen-rich air of oxygen concentration is only fed to the case of container 11 It is interior, wherein the lower nitrogen-rich air of the oxygen concentration is after remaining in the outer air discharge of the case in absorbing cylinder 34,35, pipeline etc. It generates.Therefore, according to the CA device 60, the oxygen concentration of air in the case in container 11 can be adjusted to than alternately Absorption movement and desorption movement and the low concentration of oxygen mean concentration (being in the present embodiment 8%) of nitrogen-rich air generated.

If just as above-mentioned second operation mode (part supplying operation), the rich nitrogen that will not be generated in desorption acts A part of air feeds in the case of container 11 and arranges a part of the nitrogen-rich air generated in desorption acts outside case, The amount for then feeding to the nitrogen-rich air in container 11 casees can be reduced.As a result, if the oxygen of air is dense in the case in container 11 The second operation mode (part supplying operation) is carried out when spending higher, although then supplying the lower nitrogen-rich air supply amount of oxygen concentration It is very few, so there are the oxygen concentrations of air in the case in container 11 to be difficult to decrease such problems.

Then, in the present first embodiment, CA device 60 is constituted are as follows: the oxygen of air is dense in the case in container 11 Degree is reduced to normal concentration (being 8% in present embodiment) or less pervious period, carries out the richness that will be generated in desorption acts Nitrogen air all feeds to the first operation mode (whole supplying operations) of container 11, when the oxygen of air in the case in container 11 After concentration decreases, then the second operation mode (part supplying operation) is carried out, it, will be dynamic in desorption under second operation mode Make initial stage generates, the higher nitrogen-rich air of oxygen concentration to discharge, and the lower nitrogen-rich air of oxygen concentration is only fed into container In 11 case.As described above, when the oxygen concentration of air is higher in the case in container 11, with the nitrogen-rich air that feeds in case Oxygen concentration is compared, and pays the utmost attention to feed to the supply amount of the nitrogen-rich air in case, therefore the rich nitrogen generated in desorption acts is empty Gas is all fed in the case of container 11, thus it enables that the oxygen concentration of air promptly reduces in the case in container 11.Separately On the one hand, the supply amount after oxygen concentration of air in the case in container 11 is declined, with the nitrogen-rich air fed in case It compares, pays the utmost attention to feed to the oxygen concentration of the nitrogen-rich air in case, therefore the lower nitrogen-rich air of oxygen concentration is only fed into packaging In the case of case 11, so as to make the oxygen concentration of air in the case in container 11 drop to lower concentration (in this embodiment party For 5%) in formula.

According to this first embodiment, be provided with: the exhaust that supply passageway 44 and oxygen drain passageway 45 are connected is used Connecting path 71；Exhaust switch valve 72；Supply side switch valve 73；And control unit 55, the control unit 55 control exhaust is with opening The opening and closing of valve 72 and supply side switch valve 73 are closed switch gas supply action and gas discharging operation.According to this One embodiment, using this simple structure, by only switching over exhaust switch valve 72 and supply side switch valve 73 On and off simply controls in this way, it will be able to be easy to carry out by making gas supply action and gas discharging operation The second operation mode (part supplying operation) of switching and realization.

According to this first embodiment, it is provided with measurement access 81 and measurement switch valve 82, wherein the measurement is used logical Road 81 flows into the nitrogen-rich air in supply passageway 44 after generating in CA device 60 and guides the oxygen being arranged in container 11 casees into In sensor 51, which makes measurement access 81 open, close.It according to this structure, will by control unit 55 The control of measurement switch valve 82 is in an open state, and is to close shape by exhaust switch valve 72 and the control of supply side switch valve 73 State, and the nitrogen-rich air flowed in supply passageway 44 is guided into lambda sensor 51 from measurement access 81, so as into Row measures the gas supply measurement movement of the oxygen concentration of the nitrogen-rich air.In addition, empty to measure rich nitrogen by carrying out gas supply measurement movement The oxygen concentration of gas, can performance to CA device 60, the nitrogen-rich air that is whether generates desired nitrogen concentration carry out Detection.That is, by using the oxygen concentration sensor 51 that the oxygen concentration to air in the case in container 11 measures, The bad phenomenon that nitrogen concentration sensor is also able to detect CA device 60 is not provided in CA device 60.

In addition, having used the CA device for carrying out the second operation mode (part supplying operation) according to this first embodiment 60, under second operation mode, start time will not be being acted (the first movement and each movement of the second movement since desorption Moment) play by the stipulated time until in a period of the nitrogen-rich air that generates feed to it is in the case of container 11 that the richness nitrogen is empty Gas is arranged outside case, and the rich nitrogen that will only generate in a period of after the stipulated time until at the time of desorption, which acts, to be terminated Air is fed in the case of container 11.As described above, being in the nitrogen-rich air generated in CA device 60, initial stage is acted in desorption The higher nitrogen-rich air of the oxygen concentration of generation is discharged to outside case, therefore, is generated after only the nitrogen-rich air can be discharged to outside case The lower nitrogen-rich air of oxygen concentration feed in the case of container 11.It therefore, can be by the oxygen of air in the case in container 11 Concentration adjusts the oxygen mean concentration to the nitrogen-rich air generated than alternately absorption movement and desorption movement (in this embodiment party It is 8%) low concentration in formula.

The variation 1- of first embodiment

As described above, if carrying out in the case for the nitrogen-rich air generated in gas generation movement not being fed to container 11 And arrange the gas discharging operation outside case, then the amount for feeding to the nitrogen-rich air in container 11 casees can be reduced.As a result, if gas The actuation time (efflux time of nitrogen-rich air) of discharging operation is too long, then have can for the oxygen concentration of air in the case in container 11 It can be difficult to promptly reduce.

Then, in the present first embodiment, also it is configured to that the actuation time of gas discharging operation can be changed, In the gas discharging operation, by the rigid oxygen concentration started when desorption acts (when just having started the first movement and second each movement of movement) Higher nitrogen-rich air is arranged outside case.According to this structure, gas is suitably changed by the situation in the case according to container 11 The actuation time of discharging operation, so as to reduce the oxygen concentration of air in the case in container 11 promptly.

(second embodiment of the present invention)

Second embodiment is as obtained from the part-structure for changing the control unit 55 of first embodiment.Second In embodiment, control unit 55 is constituted are as follows: in addition to executing the first operation mode being the same as the first embodiment (all supply fortune Turn) other than (referring to Fig.1 0) and the second operation mode (part supplying operation) (referring to Fig.1 1), also execute as shown in figure 12 the Three operation modes (part supplying operation) thus carry out concentration and adjust operating.Third operation mode is (to extend to 7 by extension Second) under the second operation mode carry out gas discharging operation actuation time (efflux time of nitrogen-rich air) obtained from.? In second embodiment, control unit 55 is configured to carry out following concentration and adjusts operating, it may be assumed that executes and is the same as the first embodiment First operation mode (referring to Fig.1 0) and the second operation mode (referring to Fig.1 1), once the oxygen of air is dense in case in container 11 Degree is reduced to normal concentration, just changes into the actuation time of gas discharging operation (efflux time of nitrogen-rich air) 7 seconds from 4 seconds And third operation mode is executed, so that the oxygen concentration of air is reduced to desired concentration (in this implementation in case in container 11 For 3%) in mode.

Specifically, implementing when the oxygen concentration of air is higher than 8% in the case detected using lambda sensor 51 with first Mode is the same, and control unit 55 executes the first operation mode.Then, once in case in container 11 air oxygen concentration by into The first operation mode of row is reduced to 8%, is just the same as the first embodiment, and executes the second operation mode.Then, once container The oxygen concentration of air is reduced to 5% by carrying out the second operation mode in case in 11, in this second embodiment just by gas The actuation time of discharging operation changed into longer 7 seconds from 4 seconds and executes third operation mode, replaced first embodiment with this In stop mode.

Under third operation mode, control unit 55 is also to first direction as the first operation mode and the second operation mode Control valve 32 and second direction control valve 33 switch over, and are alternately repeated to be pressed and make to move in the first movement with second Switching (referring to Fig. 9) between work, the nitrogen-rich air that Lai Shengcheng nitrogen concentration is higher than air outside case and oxygen concentration is lower than air outside case (gas generation movement).

In addition, as shown in figures 7 and 12, under third operation mode, control unit 55 also as the second operation mode, The control of exhaust switch valve 72 is in an open state in the stipulated time at the initial stage of the first movement and second each movement of movement, and will Supply side switch valve 73 control be in off state to carry out gas discharging operation, in the gas discharging operation, will not by into The nitrogen-rich air that the row gas generation is acted and generated feeds in the case of container 11 and arranges the nitrogen-rich air outside case.So Afterwards, after gas discharging operation, the control of exhaust switch valve 72 is in off state by control unit 55, and supply side is switched The control of valve 73 is in an open state to carry out gas supply action, will be raw by carrying out the gas in the gas supply action The nitrogen-rich air generated at movement is fed in the case of container 11.

Under third operation mode, as the second operation mode, gas was carried out before gas supply action by carrying out Body discharging operation, so as to only feed to the nitrogen-rich air that oxygen concentration is lower than the nitrogen-rich air generated under the first operation mode In the case of container 11.In addition, by the way that movement is exhausted simultaneously with gas discharging operation and gas supply action, so that in case Air is replaced into oxygen concentration than feeding to the also low (example of the nitrogen-rich air in container 11 casees in the execution of the second operation mode Such as, oxygen mean concentration 3%) nitrogen-rich air, therefore in case air oxygen concentration decline.

Once the oxygen concentration of air drops to 3% by carrying out third operation mode in the case in container 11, control unit 55 just make gas supply device 30 shut down and stop gas supply action, and close exhaust valve 46b and keep exhaust dynamic Work stops.

The effect-of second embodiment

As described above, as the oxygen concentration of air in the case in container 11 declines, being extended into according to second embodiment The actuation time of promoting the circulation of qi body discharging operation (nitrogen-rich air of generation is arranged to the efflux time outside the case of container 11).It is specific and Speech switches to after carrying out the second operation mode and carries out the time third longer than the second operation mode of gas discharging operation and transport Rotary-die type.So, when the oxygen concentration of air is higher in the case in container 11, with the rich nitrogen fed in container 11 casees The oxygen concentration of air is compared, and pays the utmost attention to the supply amount for feeding to the nitrogen-rich air in container 11 casees, therefore not only by oxygen concentration Extremely low nitrogen-rich air is fed in container 11, but also the slightly high nitrogen-rich air of oxygen concentration is fed in container 11, by This can be such that the oxygen concentration of air in the case in container 11 promptly reduces.On the other hand, when empty in the case in container 11 After the oxygen concentration of gas is declined, compared with the supply amount for feeding to the nitrogen-rich air in container 11 casees, pay the utmost attention to feed to collection The oxygen concentration for the nitrogen-rich air cased in 11 casees, therefore only feed to oxygen concentration ratio in container 11 casees under the second operation mode The also low nitrogen-rich air of nitrogen-rich air feed in container 11, so as to make the oxygen concentration of air in the case in container 11 Drop to lower concentration.

In addition, in the first embodiment, executing stop mode, in the case where not leaning on conditioner in case, lean on The breathing of plant 15 is reduce the oxygen concentration of air in the case in container 11.In contrast, in this second embodiment, leading to Crossing and carrying out third operation mode for the extremely low nitrogen-rich air of oxygen concentration (is in the present embodiment the rich nitrogen of oxygen mean concentration 3% Air) it feeds in case.Therefore, according to second embodiment, compared with first embodiment, can make in the case in container 11 The oxygen concentration of air more quickly drops to desired oxygen concentration.

(third embodiment of the present invention)

As shown in figure 13, in the third embodiment, when the operating for making gas supply device 30 stops, control unit 55 So that air loop 3 is switched to the 4th connection status, and carries out that by-pass switch valve 48 and exhaust switch valve 72 is made to be in closing The operating of state stops control, so that air be prevented in the outer air of case and case to flow into the first absorbing cylinder 34 and the second absorbing cylinder 35 It is interior, wherein under the 4th connection status, the first absorbing cylinder 34 and the second absorbing cylinder 35 all with the second pump machanism of air pump 31 31b is connected.

Specifically, in the third embodiment, when the operating for making gas supply device 30 stops, control unit 55 will First direction control valve 32 is set as the second state, and second direction control valve 33 is set as first state.So, The suction inlet of second pump machanism 31b is connected with the first absorbing cylinder 34, and the suction inlet of the second pump machanism 31b and second is inhaled Attached cylinder 35 connects.That is, air loop 3 be switched to the first absorbing cylinder 34 and the second absorbing cylinder 35 all with air pump 31 4th connection status of the second pump machanism 31b connection.

By being switched to the 4th connection status, by the 1st directional control valve 32 make to spray access 42 and the first absorbing cylinder 34 it It is separated, and made to spray the separated of access 42 and the second absorbing cylinder 35 by second direction control valve 33, wherein the ejection is led to Road 42 is connected to via air flue 41 outside case and the first pump machanism 31a with storage space S1 outside case.In addition, by by by-pass switch The control of valve 48 is in off state, and is made to extract access 43 and is sprayed the separated of access 42, wherein the extraction access 43 and two suctions Attached cylinder 34,35 is connected to, and the ejection access 42 is via air flue 41 outside case and the first pump machanism 31a, with storage space S1 outside case Connection.Moreover, making the interruption of oxygen drain passageway 45 Yu supply passageway 44 by the way that the control of exhaust switch valve 72 to be in off state It opens, wherein the oxygen drain passageway 45 is connected to the outer storage space S1 of case, which pumps via access 43 and second is extracted Mechanism 31b is connected to two absorbing cylinders 34,35.It should be noted that preventing sky by check-valves 62 in the air loop 3 Gas is flow backwards in oxygen drain passageway 45, and air storage space S1 outside case is prevented to flow into two absorbing cylinders 34,35.Therefore, because To stop control by carrying out the operating, it is disconnected between two absorbing cylinders 34,35 and the outer storage space S1 of case, so can The outer air stream of case is prevented to enter in two absorbing cylinders 34,35.

In addition, preventing air from flowing backwards in supply passageway 44 by check-valves 65, by check-valves in the air loop 3 64 prevention air are flow backwards in branched pipe 81.Therefore, even if stopping the operating of gas supply device 30, air will not be from case Storage space S2 is flowed into two absorbing cylinders 34,35 in case.

As described above, according to third embodiment, when the operating for making gas supply device 30 stops, by by controlling Portion 55 carries out operating and stops control, and so as to prevent outside case, air is flowed into two absorbing cylinders 34,35 in air and case.In this way One, can prevent: operate stop when case outside air, the moisture that air flows into absorbing cylinder 34,35 and in air in case inhale In attached (moisture absorption) to adsorbent.

(other embodiment)

The respective embodiments described above can also be using such as flowering structure.

In above-mentioned first and second embodiment, when concentration adjusts and oxygen concentration is adjusted in operating, first Execute the first operation mode (whole supplying operations).However, in the present invention, the first operation mode not centainly needs. That is, in the first and second embodiments, can also be first carried out in the case where not executing the first operation mode Two operation modes (part supplying operation).Specifically, in the first and second embodiments, the second operational mode can also be executed Formula, until the oxygen concentration of air in the case in container 11 reaches 5%.

In the respective embodiments described above, it constitutes are as follows: an air pump 31 has the first pump machanism 31a and the second pump machanism 31b. But, the first pump machanism 31a and the second pump machanism 31b can also be made of two individual air pumps.

In the respective embodiments described above, the first adsorption section and the second adsorption section use the suction of an absorbing cylinder progress nitrogen respectively Desorption is echoed, but the quantity for constituting the absorbing cylinder of each adsorption section is not limited to one.It can also for example be adsorbed respectively by three Cylinder constitutes each adsorption section, uses six absorbing cylinders in total.

In the respective embodiments described above, illustrate for CA device 60 according to the present invention to be applied to setting in sea-freight collection The example in freezer for container 10 in vanning 11, but the purposes of CA device 60 according to the present invention is without being limited thereto. Other than sea-freight container, such as can also be in libraries such as land transportation container, general refrigerating warehouse, room temperature warehouses The composition of interior air uses CA device 60 according to the present invention in adjusting.

Industrial applicability-

In conclusion freezer for container of the present invention to gas supply device and including the gas supply device is very Useful, which feeds to nitrogen-rich air in the case of container.

Symbol description-

10 freezer for container

11 containers

15 plants

20 refrigerant circuits

30 gas supply devices

The first pump machanism of 31a (pressurization part)

The second pump machanism of 31b (relief portion)

34 first absorbing cylinders (absorbing cylinder)

35 second absorbing cylinders (absorbing cylinder)

44 supply passageways

45 oxygen drain passageways

46 exhaust portions

51 lambda sensors

55 control units

60 CA devices (conditioner in case)

Connecting path is used in 71 exhausts

Switch valve is used in 72 exhausts

73 supply side switch valves

81 branched pipes (measurement access)

Switch valve is used in 82 measurements

Claims

1. conditioner in a plants case is mounted on the container (11) for the plant (15) that storage is breathed,

Conditioner includes: in the case

Absorbing cylinder (34,35) is accommodated with the adsorbent of the nitrogen component in absorption air in the inside of the absorbing cylinder (34,35)；

First pump machanism (31a), first pump machanism (31a) is by feeding to air outside case in the absorbing cylinder (34,35) And pressurize to the absorbing cylinder (34,35), so that the absorbing cylinder (34,35) is allowed to carry out absorption movement, absorption movement are as follows: in the suction The movement of the nitrogen component in the air is adsorbed in attached cylinder (34,35) by the adsorbent；And

Second pump machanism (31b), second pump machanism (31b) and extracting air out of the absorbing cylinder (34,35) incite somebody to action The absorbing cylinder (34,35) decompression, so that the absorbing cylinder (34,35) is allowed to carry out desorption movement, desorption movement are as follows: in the absorbing cylinder Make the movement desorbed into the air by the adsorbent nitrogen component in (34,35),

Conditioner is constituted in the case are as follows: allows the absorbing cylinder (34,35) alternately absorption movement and described Desorption movement, to generate the nitrogen-rich air that nitrogen concentration is higher than air and oxygen concentration is lower than air, and the nitrogen-rich air is fed to In the case of the container (11),

Conditioner is characterized in that in the case:

In the case conditioner be configured to carry out part supplying operation, in the part supplying operation, will from The nitrogen-rich air row Xiang Suoshu generated in a period of until playing at the time of the desorption movement beginning by the stipulated time Outside the case of container (11), and will be during after the stipulated time until at the time of the desorption, which acts, to be terminated The nitrogen-rich air of interior generation is fed in the case of the container (11),

Conditioner is constituted in the case are as follows: as the oxygen concentration of air in the case in the container (11) declines, is prolonged It grows and the nitrogen-rich air is arranged to the efflux time outside the case of the container (11) in the part supplying operation.

2. conditioner in case according to claim 1, it is characterised in that:

Conditioner is constituted in the case are as follows: it is dense to reach regulation for the oxygen concentration of air in the case in the container (11) Whole supplying operations are carried out before degree is following, in the whole supplying operation, will be at the time of since acting the desorption In the case that the nitrogen-rich air generated in a period of until at the time of end all feeds to the container (11)；

Once the oxygen concentration of air in the case in the container (11) reach the normal concentration hereinafter, once carry out the part Supplying operation.

3. conditioner in case according to claim 1 or 2, it is characterised in that:

Conditioner includes: in the case

Supply passageway (44), the supply passageway (44) connect with the ejiction opening of second pump machanism (31b), and will from this The nitrogen-rich air that two pump machanisms (31b) spray is guided into the case of the container (11)；

Oxygen drain passageway (45), the oxygen drain passageway (45) connect with the absorbing cylinder (34,35), and nitrogen concentration is compared air The low and oxygen concentration oxygen-enriched air higher than air arranges the outside of the conditioner into the case, wherein the oxygen-enriched air is The absorption movement is carried out in the absorbing cylinder (34,35) and is generated；

Connecting path (71) are used in exhaust, and the exhaust supply passageway (44) and the oxygen is discharged with connecting path (71) logical Road (45) connects；

Switch valve (72) are used in exhaust, and the exhaust is arranged on exhaust connecting path (71) with switch valve (72), described Exhaust is opened with switch valve (72), closes the exhaust connecting path (71)；

Supply side switch valve (73), supply side switch valve (73) setting are more described than being connected in the supply passageway (44) Exhaust is more leaned on the part on the inside of the case of the container (11) with the interconnecting piece of connecting path (71), the supply side switch valve (73) it opens, close the supply passageway (44)；And

Control unit (55), the control unit (55) switch over gas discharging operation and gas supply action, arrange in the gas Out in movement, the exhaust switch valve (72) control is in an open state and switchs the supply side by the control unit (55) Valve (73) control, which is in off state, arranges the generated nitrogen-rich air outside the case of the container (11), in the gas In supply action, the exhaust switch valve (72) control is in off state and opens the supply side by the control unit (55) Pass valve (73) control, which is in an open state, feeds to the generated nitrogen-rich air in the case of the container (11).

4. conditioner in case according to claim 3, it is characterised in that:

Conditioner includes: in the case

Access (81) are used in measurement, the nitrogen-rich air that the measurement will be flowed with access (81) in the supply passageway (44) It guides into the lambda sensor (51) being arranged in the case of the container (11)；And

Switch valve (82) are used in measurement, and the measurement is arranged on measurement access (81) with switch valve (82), and plays open and close The measurement access (81) is closed,

The control unit (55) is configured to carry out gas supply measurement movement, and in gas supply measurement movement, the control unit (55) will The exhaust switch valve (72) and the supply side switch valve (73) control are in off state, and the measurement is used and is switched Valve (82) control is in an open state, so that the lambda sensor (51) be allowed to measure the oxygen concentration of the nitrogen-rich air.

5. a kind of freezer for container is mounted on the container (11) for the plant (15) that storage is breathed,

The freezer for container includes:

Refrigerant circuit (20), the refrigerant circuit (20) carry out refrigeration cycle and come to empty in the case in the container (11) Gas is cooled down；And

Conditioner (60) in case, conditioner (60) has gas supply device (30) and exhaust portion in the case (46), the composition of air in the case in the container (11) is adjusted, wherein the gas supply device (30) generates nitrogen The nitrogen-rich air that concentration is higher than air and oxygen concentration is lower than air, and the nitrogen-rich air is fed to the case of the container (11) Interior, which arranges air in the case in the container (11) outside case,

The freezer for container is used to be adjusted to wish by the temperature of air in the case in the container (11) and composition The temperature and composition of prestige,

The freezer for container is characterized in that:

Conditioner (60) in conditioner (60) case as described in any one of claims 1 to 4 in the case It constitutes.